Hi all I've not attached a picture of my clients hair as it won't let me for some reason! I've not done her hair before. She has blonde on top and red underneath. Her roots look to be mostly grey amd she says her roots underneath are the same, although I do think they look a little darker. I've looked for a bright red and found the Colorissimo HLR. Can anyone please tell me if using this with a 3% developer will give much vibrancy. I'm kind of reluctant to use a high level peroxide on it with her being so grey! Does anyone also know what the grey coverage is like with this colour also? Thanks in advance.